What is the pattern of the numbers 1,3,6,10,15,21,28,36

Vlada [557]

<h2><em>y 2 + 6 y − 16 = ( y + 8 ) ( y − 2 ) </em></h2><h2 /><h2><em>Explanation: </em></h2><h2><em>Note that in general: </em></h2><h2 /><h2><em>( y + a ) (y − b ) = y 2 + ( a − b ) y − a b </em></h2><h2 /><h2><em>So we want to find a pair of factors a and b of 16 which differ by 6 . </em></h2><h2><em>The pair 8 , 2 works in that 8− 2 = 6 and 8 ⋅ 2= 16 . </em></h2><h2 /><h2><em>Hence: </em></h2><h2><em> y 2 + 6 y − 16 = ( y+ 8 ) ( y − 2 )</em></h2><h2><em>y=2,-8</em></h2>

6 0

3 years ago

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What is a square a parallelogram but a parallelogram not a square a square

Alinara [238K]

A square has both parallel sides
being the top and bottom
but also both the sides

AND so does a PARALLELogram
BUT a square has ALL right (90 d) angles
and a parallelogram does NOT

ALSO . . . . . SUMMARY . . . . .
The sides of a square are parallel
and all the angles equal 360 degrees,
so it's a parallelogram. BUT a
parallelogram is NOT a square
because a squares angles need to be 90 degrees.

does that answer your question?

3 0

3 years ago

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Libby reads for 0.75 of an hour every night. How many hours will she read in 1 week. <br> show work

Norma-Jean [14]

Answer:

5.25 hours

Step-by-step explanation:

One week = 7 days

7 x 0.75 = 5.25 Hours

Hope this helps, mark as brainliest :)

7 0

3 years ago

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Help me please im grade 8 and that qustion id from revel

N76 [4]

Angle 1 is a vertical angle with 6

5 0

2 years ago

If PQRS is a rhombus, which statements must be true? Check all that apply.

bezimeni [28]

These statements are true:

$\bold{First.} \ \overline{PS} \ is \ parallel \ to \ \overline{QR}$

This is <em>true</em> because of the definition of a rhombus which states that opposite sides are parallel.

$Then \ \overline{PS} \ is \ opposite \ to \ \overline{QR}$

$\bold{Second.} \ \overline{PR} \ is \ perpendicular \ to \ \overline{QS}$

This is <em>true </em>because the diagonals of a rhombus bisect each other at right angles.

$\bold{Third.} \ \overline{PQ}=\overline{RS}$

This is<em> true</em> because the four sides of a rhombus are all equals.

$\bold{Fourth.} \ \angle PQR \ is \ supplementary \ to \ \angle QPS$

This is also <em>true</em>. Two angles are supplementary when they add up to 180 degrees. Angles in rhombus are equal two to two. Let's name:

$\angle PQR = \alpha \ and \ \angle QPS = \beta$

Then it is true that:

$\angle PQR=\angle PSR \ and \ \angle QPS=\angle QRS$

Besides, a rhombus is a quadrilateral and it is true that the interior angles of a quadrilateral add up to 360 degrees, thus:

$2\alpha+2\beta=360 \\ \\ \therefore \boxed{\alpha+\beta = 180^\circ}$

5 0

3 years ago

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